Study of initial stage of mechanochemical transformation in pyrite
| Autor: | Boris Kunev, Ivan Mitov, Daniela Paneva, Hristo Kolev, D. Mitova, Elina Manova |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
lcsh:TN1-997
Infrared Chemistry Inorganic chemistry Metals and Alloys Analytical chemistry engineering.material minerals Geotechnical Engineering and Engineering Geology Kinetic energy Reaction rate constant X-ray photoelectron spectroscopy Mechanics of Materials kinetics Mechanochemistry pyrite oxidation Mössbauer spectroscopy Moessbauer spectroscopy Materials Chemistry engineering Pyrite mechanochemistry Powder diffraction lcsh:Mining engineering. Metallurgy |
| Zdroj: | Journal of Mining and Metallurgy. Section B: Metallurgy, Vol 43, Iss 1, Pp 57-70 (2007) |
| ISSN: | 1450-5339 |
| Popis: | The initial stage of transformation of pyrite to Fe(II)-sulfate as a result of mechanical milling is studied by X-ray powder diffraction (XRD), Moessbauer spectroscopy (MS), Infrared (IR) and X-ray photoelectron spectroscopy (XPS) techniques. A degree of conversion of 0.071 is achieved in the time interval of 0 36 min. The kinetic data satisfy the equation of a shrinking core reaction 1-(1-?)1/3=kt. The reaction is of the first order. The calculated rate constant is k=6.434.10-4 min-1. . |
| Databáze: | OpenAIRE |
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